So it sounds like the ASAN gtests must run on a different instance type....do we know if that's the cause of the failures here for TaskCluster? Looping Joel in in case he has any idea as I do not know much about these tests.

given that these are hidden on treeherder for all branches for both buildbot/taskcluster, we should question the value of having these around- adding :decoder, :mccr8, :chmanchester as they are interested parties

Don't you just love the magic of the passage of time? When treeherder decided to get rid of exclusions in favor of in-tree tiers, it apparently decided to just ignore the problem of dealing with this particular unworkable case, so now they are visible again, and although they pretty much suck on esr52 we're pretty much indifferent to unstarred suckage there, and on beta/release they aren't half bad.